Therron



1,638,007 1927' c. s. ALLEN I "FRONT WHEELDRIVE BRAKE MECHANISM Filed April 26. 1924 2 Sheets-Sheet 1 v1927., Aug c. s. ALLEN FRON'I WHEEL DRIVE BRAKE MECHANISM Filed April 26. 1924 2 SheBts-Sheet 2 of the heel in a very simple manner, yetv Patented Aug. 9, 1927.

CHARLES snnrnm'orsen FRANCISCO, CALIFORNIA, Assieuon or ONE-TWENTIETH TO JOHN SPEREKAS AND FRANK cool-ms, Borrror CINCINNATI,

onro; THERRON J. 'ALLEN ADMINISTRATOR OF.TI-IE ESTATE OF. SAID CHARLES S. ALLEN; DE-

oEAsEn.

I v FRCNT-WHEEL-DRIVE BRAKE MECHANISM.

Application filed'ApIil 2e,1924.,. Serial No. 709,091.'

'Tl1is invention isin theavay of a driv- I ing'and braking arrangement forfthe front]. Wheels of a four Wheel drive automobile and;

Another object is to provide ,a means,

Wherebythe steering of thefront Wheels is effected in a very simple manner.v

Another object .is to provide a differential- Whose spindle is rigidly secured." in thehub may be readilvdisassembled' if desired.

A further object is to provide a differential housing ofa'ball and socket type thatv Will completely/enclose the differential and keep it dust-proof Without interfering With the steeringof thew-heel.

A stillfurther object is to provide'a balland socket arrangement inthe brake rods to permit the ready steering 'of' the front Wheels.

A still furtherobject-is to provide a drive,

Whose difl erential'eis constructed in such a manner to eliminate all possible friction.-

' These and other objects will be apparent from theaccompanyingdrawings and specifications;

.In the drawing Figure 1 is a longitudinalyvertical section one of the front wheels;

of the assembled driving arrangement of- Figure 2 is ahorizontal sect'on of the as? sembled driving arrangementsofxone ofthe front Wheels; i

Figure3 is a side view-of the assembled driving arrangement; 1 a p Figure 41s section: on line l-.iof Fig: ure 1; :'l s Figure '5 is sectional detailof the com: binedihub 'andzbrake drum; H v

Figure 6 is a detailed side View of the combined hub and brake drum;

Figure 7: isa sectional-detail ofthe primary yoke;-

, primary yoke;-;

Figure 9 is a sectional detail of the secondary yoke; V A

Figure 10 isa detailed plan View of the secondary yoke;

Figurell is a detail of the spindle;

I t Figure 12 is a detail of the primary stud;

Figure 13 is a detail of the secondary stud; I

Figure 14: is a detail of the ball and socket brake rods;

aperture 5 communicates with the fluted aperture 4 in the bearing 2. Bolt holes 6 I are provided in the flange 7 of the brake drum 8 A Wheel 8 is mounted on the hub 1. A rlng 9 having bolt holes 10 provided therein is mounted on the hub 1 on the outside of the Wheel 8. fBolts-11 are passed through the bolt holes 6 of the fiange;7 of

the brake drum.3, and the spokes of the Wheel 8 and the bolt holes .10 of the ring 9,

. vided fora purpose to be later explained.

Arms13 and 14, ears 15 and 16 and a collar 17 are incorporated in the primary yoke 12. A lug 18 is incorporated in they ear 15. A lug 19 is incorporated'in the arm 13. An aperture 20 is provided in the yoke 12 and the collar 17; the said aperture 20 has steplike reductions provided therein. A secondary stud aperture 21 is provided in the ear 15 and lug 18, and a primary stud aperture 22 is provided in the ear 16. Grooves 23 are cut in the outer edge of the ears 15 and16. A ball bearing race 24 is pressed onto the collar-17, and a ring 25 is rigidly secured on the said collar 17 on the outer side of the ball bearing race 24. The ball bearing race 24 of the collar 17 engages the periphery of the aperture 5 of the hub 1. A spindle 26 has a beveled gear 27 rigidly secured to its one end 28, and has its opposite end.29 fiuted as shown at 30. A reduced threaded portion 31 is provided in the end 29. A portion of the end 28 is threaded.

A ball bearing race 33 is pressed onto the end 28 in back of the beveled gear 27, and a collar 34 is screwed onto the threaded portion 32 and is adapted to bear against said ball bearing race 33 to prevent it from working loose. A spindle 26 is passed through the aperture 20' of the .collar 17 of the yoke 12, and With its fluted end 30 engages the fluted aperture 4 of the bearing 2. -A lock washer 35 and a nut 36 engage the threaded.

end 31 in order to keep the primary yoke 12 and the spindle 26 mounted within the hub- 1 and bearing 2. A cap 37 engages the outer end ofthe bearing 2-. A gear covering 38 having ears 39 incorporated therein, is secured to the primary yoke 12. Apertures "40 are cut. in the gear covering 38 and have ridges 41 provided in their edges. Said apertures40 correspond to the shape of the ears 15 and 16 and have their ridges 41 adapted to engage the grooves 23 of the said ears 15 and 16. An aperture 43 is provided in the gear covering 38 for a purpose to be later explained. A beveled pinion 44, having a partly threaded aperture 45 provided therein, is mounted wlthin the gear covering 38 through the medium of a. primary stud- 46. The said beveled pinion 44 meshes with the beveled gear 27. A ball bearing race 48 is mounted within the aperture 45 of the beveled pinion 44- and is secured therein b means of a collar 49 which engages the tir-eaded portion ofthe aperture 45 of the beveled pinion 44 and a screw 50 which is passed through the aperture 45 of the said beveled pinion 44 and secured in the primary stud 46. The said primary stud 46 isthreaded as shown at 51; A secondary stud 52 which is threaded as shown at 53 engages the secondary stud aperture 21 of the ear 15. The said secondary stud 52 has aper- 59. A beveled gear 63 ismounted upon the tapered spindle and'is rigidly secured thereon by means of a lock Washer 64 and a nut 65 which engage the end of the tapered spindle 60. The axle 57 with its tapered spindle 60 and beveled gear 63' mountedthereon is passed through the aperture 43 of the gear covering 38 and engages the beveled pinion 44. A secondary yoke 66, having ears 67 and 68 and flanges, 69 corresponding to the shape of the gear covering- 38, and a bearing 70 incorporated therein,

' ed to the brake band 85. as; shown at 91.

is mounted upon the axle 57. A bearing aperture 71 and axle aperture 72 are provided in the secondary yoke 66 and the bearing 7 0 respectively to permit mounting the said secondary yoke66 upon the said axle 57. A. ball bearing race 61- engages the bearing aperture 71 of the secondary. yoke 66. Apertures 73 and74are provid'ed in the cars 67 and 68 respectively, and are adapted to engage: the secondary stud 52 and the primary stud 46 in order to form a knuckle joint.. The fianges69of the secondary yoke 66 engage the gear covering 38 around'the apertures 43 in: order to form adust-proof covering'without" interfering with the steering arrangement of theiwheeli 8. An axle sleeve 7 5'which is mounted upon. the axle57 enga es the outer periphery of the bearing 7 0o the-secondary yoke 66; The bearing 76 is mounted upon theaxle sleeve. andrthe. bearing 77 is mounteduponth'e'secondary yoke 66in line with thebearing- 76. A shaft 78, having alever arm 79, and an arm 80 carrying a ball 81, incor orated therein, is mounted in the bearings t6 and 77. Collars 82 are mounted upon the shaft 78 in order to prevent sidepl'ay'. An arm 83 is mounted: upon thelu 19 and has. an aperture 84 incorporatedt erein. The said arm 83 has a socket 941 provided therein to provide a connection. for the. steering'knuckle tie rod 95. A brake band-85 is secured to the. arm 14 and engages the-.brake-druni 3. A rod 86: having a. spring 87 mounted thereon engages theaperture. 84 and is pivoted to the brake band 85 as shown. at: 88,. and to the arm 89 which. carries aball. 90, and is pivot- A rod 92 having bearing sockets 93 incorporated in their ends engages the ball 81 of the arm. 80 andtheballQO of the. arm 89.

In. operation,..power'istransmitted to the axle 57 carrying the-beveled gear 63, thence through the beveled pinion 44 to the beveled gear 27-, and the .fluted spindle 30, and into. the wheel 8 through the hub land bearing 2. The ball and socket joints'ofthe rod 92 and the arms'80 and 89' permitaeasy. application of thebrake band 85, while steering the wheel 8 through the knuckle joint. formed by the primary yoke 12, the secondary yoke- 66, and the primary: stud 46 and the secondary stud 5 While I have herein described a certain specific method of constructing and assembling the elements of myinvention, it'isunderstood same may be varied in minordetails, not departing fromthe spirit ofmy invention as defined in the. appended claims.

I claim: v

1. In a four wheel motor drive as described the combination of a. wheel hub formed with a spindle bearing and a brake provided with an axle aperture secured to said primary yoke; a secondary yoke provided with pivot apertures and flanges 'mounted over said gear housing the said flanges partially covering the axle aperture and forming a dust-proof housing; the pivot apertures of said secondary yoke are aligned with pivot apertures of said primary yoke and have pivots mounted therein; an axle passed thru the secondary yoke, journaled in said secondary yoke and extended into said gear housing; a gear secured to said axle; a pinion 'rotatively mounted on one of the pivots meshing with said ear on said axle; a gear provided with a fluted spindle journaled in said primary yoke, said gear meshing with said pinion and having its fluted spindle secured in said fluted aperture of said hub; and braking means mounted upon said brake drum and said secondary yoke.

2. In a device" of the kind described a front wheel driving mechanism; comprising a hub provided with a tapering fluted spindle aperture; a primary yoke journaled upon a ball bearing thrust bearing in said hub; pivot arms incorporated in said primary yoke provided with pivot stud apertures and grooves in the edges of said pivot arms; a gear housing provided with tongues which are adapted to engage the grooves of the pivot arms 'of'said primary yoke secured to said primary yoke; said gear housing is provided with an axle aperture; secondary yoke formed with flanges which are adapted to engage the said gear housing over said axle aperture to make said gear housing dust-proof; pivot arms provided with pivot stud apertures incorporated in secondary yoke aligned with said pivot stud apertures of said primary yoke; pivot studs mounted on ball bearing thrust bearings engaging said pivot stud apertures of said secondary and primary yokes; a gear formed with a tapering fluted spindlemounted in said fluted hub aperture; a pinion mounted upon the lower pivot stud engaging said gear; and axle journaled in said secondary yoke carrying the gear meshing with said pinion; and means for steering said front wheel.

In testimony whereof I affix my signatu re.

CHARLES S. ALLEN. 

